Swift PopOverController自定义大小和sourceRect不起作用

添加了一个bar按钮，单击bar按钮后，将显示tableview。在我的实现中有两个问题

首先，我无法用我的

BarButtonItem

其次，

TableView

将全屏显示，而不是我定义的自定义大小

let button = UIBarButtonItem(barButtonSystemItem: UIBarButtonItem.SystemItem.refresh, target: self, action: #selector(displayClassRooms(_:)))
navigationItem.rightBarButtonItem = button



@objc private func displayClassRooms(_ sender: UIBarButtonItem) {
    let popController = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "ClassRoomVC")
    popController.modalPresentationStyle = UIModalPresentationStyle.popover
    popController.popoverPresentationController?.sourceView = self.view
    popController.popoverPresentationController?.permittedArrowDirections = .up
    popController.popoverPresentationController?.sourceRect = CGRect.init(x: 300, y: 0, width: 50, height: 180 )
    popController.preferredContentSize = CGSize.init(width: 200, height: 200)
    present(popController, animated: true, completion:nil)
}

func adaptivePresentationStyleForPresentationController(controller: UIPresentationController) -> UIModalPresentationStyle {
    return .none
 }

---

将

UIPopoverPresentationControllerDelegate

分配给您的控制器类

设置popController委托

    let popoverContentController = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "ClassRoomVC")
    popoverContentController?.modalPresentationStyle = .popover
    
    if let popoverPresentationController = popoverContentController?.popoverPresentationController {
        popoverPresentationController.permittedArrowDirections = .up
        popoverPresentationController.sourceView = self.view
        popoverPresentationController.sourceRect = CGRect.init(x: 300, y: 0, width: 50, height: 180 )
        popoverPresentationController.delegate = self
        if let popoverController = popoverContentController {
            present(popoverController, animated: true, completion: nil)
        }
    }

---

是的，我已经在我的课堂上添加了

UIPopoverPresentationControllerDelegate

，但是是同一个问题。现在发生了什么，请告诉我。我在问题中报告的同一个问题，popover仍然显示在全屏上。我在我这边试过，效果很好，但这里我从按钮框中取出一个按钮和pop控制器作为源矩形试着这样做，让我知道它是否有效？是的，当然，等等。